"Scheduling is permitted, start the live spraying operation!" Hua Chenjian, deputy head of the live operation class of the State Grid Shanghai Qingpu Power Supply Company, issued an instruction.
35 kV Qingfeng line live insulation spraying job site. The pictures in this article are all provided by State Grid Offshore Power
On the afternoon of February 25, on the side of the 35 kV Qingfeng 3603 overhead transmission line in Qingdong Farm, Qingpu District, three intelligent coating robots completed insulation spraying of the overhead power wires in operation with the coordination of unmanned aerial vehicles. This is the first time that the Shanghai power grid has carried out live insulation spraying operations on 35 kV transmission lines.
The staff made the final preparation for the intelligent coating robot.
At the scene, the staff first manipulated the drone suspension tow rope, pulled up the special "upper line belt" tied to the sides of the intelligent coating robot, and accurately fixed it to the power wire more than 10 meters high through the card slot. Subsequently, the robot's built-in hoist began to tighten the "upper line belt", and the robot took off autonomously and was attached to the wire through the robotic arm.
Then, the roller on the robotic arm starts running, and the robot travels along the wire at a speed of 3 meters per minute while uniformly spraying a 4 mm thick layer of self-curing polymer lightweight insulation material for the wire. After about 10 minutes, all three bare wires with a total length of 90 meters were draped in a new "insulating protective coat".
The intelligent robot travels autonomously along the power overhead line at a height of more than 10 meters, and sprays the wire with self-curing polymer lightweight insulation material.
Fang Qi, deputy director of the Transportation and Inspection Department of the State Grid Shanghai Qingpu Power Supply Company, introduced that lines like the 35 kV Qingfeng Line, due to the long operation period, the trees below grow luxuriantly, birds often nest here in the spring, and the power wire is exposed for a long time There is a hidden danger of tripping, so insulating the line is not only conducive to the safe operation of the power grid, but also helps to protect the local ecological environment.
The intelligent robot sprays the wire with a self-curing polymer lightweight insulating material (the black part of the wire).
"In the past, such coating operations could be carried out in the state of line suspension, but the 35 kV Qingfeng line was connected to another 10 kV overhead line, so it was more difficult to transform the power outage." Fang Qi said that the blackout is the best power service, the implementation of live insulation spraying with robots can efficiently and safely eliminate the hidden dangers of line risks without affecting the normal power supply of users.
With the holding of the four CIIE, as well as the accelerated implementation of the Yangtze River Delta integration strategy and the task of new digital infrastructure, the requirements for power supply reliability have been continuously improved. To this end, the State Grid Offshore Power preferentially piloted in Qingpu District, and carried out line insulation coating in the form of robot live operation in the line section with prominent hidden dangers of external damage. In the future, it is also expected to promote this "live replacement" line transformation method in the city, minimize the impact of construction work on users' power outages, and continuously improve the reliability of power supply in the urban power grid.